(1. 包头钢铁学院 生物与化学工程系, 包头 014010;
2.包头钢铁学院 冶金 工程研究所, 包头 014010)
摘 要: 利用差热分析法研究了EuCl3-KCl二元系相图,发现该体系有两个固液同组成化合物EuCl3·3KCl和2EuCl3·KCl,体系相变点分别为765℃,EuCl3 25%(摩尔分数)和555℃,EuCl3 66.7%(摩尔分数); 一个异分熔化化合物EuCl3·2KCl,转熔点为564℃,EuCl3 42%(摩尔分数);3个低共熔点分别为650℃, EuCl3 12%(摩尔分数),500℃,EuCl3 55%(摩尔分数)和490℃,EuCl3 85%(摩尔分数)。 同时探讨了相图的某些规律。
关键字: EuCl3-KCl;二元体系;相图;相图规律
EuCl3-KCl
(1. Department of Biological and Chemical Engineering,Baotou University of
Iron and Steel Technology Baotou,Baotou 014010,China;
2.Institute of Metallurgical Engineering,Baotou University of Iron and
Steel Technology Baotou,Baotou 014010,China)
Abstract:The phase diagram of binary system EuCl3-KCl is investigated by DTA. In the EuCl3·KCl system the milting points of the two congruent compounds EuCl3·3KCl and 2EuCl3·KCl are 765℃ with EuCl3 25%(mole fraction) and 555℃ with EuCl3 66.7% respectively, aperitectic point of the incongruent compound EuCl3·2KCl is 564℃ with EuCl3 42% and three eutectic points are 650℃ with EuCl3 12%,500℃ with EuCl3 55% and 490℃ with EuCl3 85% respectively. Some rules of the phase diagram are also explored.
Key words: EuCl3-KCl;binary system;phase diagram;rule of phase diagram